AS201106: the SPARTANHOST network

AS201106 is an internet Autonomous System operated by SPARTANHOST (the United Kingdom). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS201106?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS201106 was assigned to SPARTANHOST by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS201106 currently announces 28 IPv4 block(s), totaling about 14.1 thousand addresses (14,080 in all), registered in the United Kingdom. Services from SPARTANHOST are reached through these addresses.

What it means to see AS201106 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS201106. That means the other end sits on the SPARTANHOST network (the United Kingdom). It can be legitimate — a cloud service, an ISP, a CDN — or an unexpected connection worth checking.

How to see every connection and network your devices reach

Tracing one connection's ASN at a time is tedious. Sentinela, by PC Monitor, maps the devices on your network, shows what is exposed to the internet and helps flag suspicious connections and devices — running on your Windows. Meet Sentinela.